<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar
    class="page-nav-bar"
    title="登录"

    >

    <van-icon
    slot="left"
    name="cross"
    @click="$router.back()"
     />
    </van-nav-bar>
     <!-- /导航栏 -->

     <!-- 登录的表单 -->
     <van-form ref="loginForm" @submit="onSubmit">
  <van-field
    v-model="user.mobile"
    name="mobile"
    placeholder="请输入手机号"
    :rules="userFormRules.mobile"
    type="number"
    maxlength="11"
  >
  <i slot="left-icon" class="toutiao toutiao-shouji"></i>
  </van-field>
  <van-field
    v-model="user.code"
    name="code"
    placeholder="请输入验证码"
    :rules="userFormRules.code"
    type="number"
    maxlength="6"
  >
  <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
  <template #button>
    <!-- time 倒计时 -->
    <van-count-down
    v-if="isCountDownShow"
    :time="1000 * 60"
    format="ss S"
    @finish="isCountDownShow = false"
    />
    <van-button
    v-else
    class="send-sms-btn"
    native-type="button"
    round
    size="small"
    type="default"
    @click="onSendSms"
    >发送验证
    </van-button>
  </template>
  </van-field>
  <div class="login-btn-wrap">
    <van-button class="login-btn" block type="info" native-type="submit">登录</van-button>
  </div>
</van-form>

      <!-- /登录的表单 -->
  </div>
</template>

<script>
// 按需加载
import { login, sendSms } from '@/api/user'

export default {
  name: 'LoginIndex',
  comments: {},
  props: {},
  data () {
    return {
      user: {
        mobile: '', // 手机号
        code: '' // 验证码
      },
      userFormRules: {
        mobile: [{
          required: true,
          message: '手机号不能为空'
        }, {
          pattern: /^1[3|5|7|8]\d{9}$/,
          message: '手机号格式错误'
        }],
        code: [{
          required: true,
          message: '验证码不能为空'
        }, {
          pattern: /^\d{6}$/,
          message: '验证码格式错误'
        }]
      },
      isCountDownShow: false // 是否展示倒计时
    }
  },
  computed: {},
  watch: {},
  created () {},
  mounted () {},
  methods: {
    async onSubmit () {
      // 1. 获取表单数据
      const user = this.user

      // 2. 表单验证
      // 在组件中必须通过 this.$toast 类调用 Toast
      this.$toast.loading({
        message: '加载中...',
        forbidClick: true, // 禁用背景点击
        duration: 0 // 持续时间，默认数2000，如果为0则持续展示
      })
      // 3. 提交表单请求登录
      try {
        const { data } = await login(user)
        this.$store.commit('setUser', data.data)
        this.$toast.success('登录成功')
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登录失败,请稍后重试')
        }
      }

      // 4. 根据请求响应结果处理后续操作
    },
    async onSendSms () {
      console.log('onSendSms')
      // 1. 校验手机号
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch (err) {
        return console.log('验证失败', err)// 这里的return 是停止代码往后执行
      }

      // 2. 验证通过，显示倒计时
      this.isCountDownShow = true
      // 3. 请求发送验证码
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        // 发送失败，关闭倒计时
        this.isCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送太频繁了，请稍后重试')
        } else {
          this.$toast('发送失败，请稍后重试')
        }
      }
    }
  }
}
</script>

<style scoped lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }

  .send-sms-btn {
    width: 152px;
    height: 48px;
    line-height: 48px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }

  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}
</style>
